This story is nothing super original, but there's quite a bit of charm to it.

Riko is brought into the Arima family when the head of the family (who has no children himself) pities but also is fascinated by a child who was found in the red light district to be the daughter of a wealthy girl who went missing from a prestigious family. She's quite feral and refuses to talk, so he basically decides to adopt her and provide the girl with better support in his own home.

We aren't entirely sure about Riko's past, but the strength of this manga lies in the small hints we get throughout that Riko has gone through something terrible, and now views the world completely differently than everyone else.

Luckily, she comes under the care of Ogata Tohru, the head butler of the Arima family who could put Sebastion to shame.

Riko is described as a wild cat, and Ogata is the only one who's able to tame her.

Thus begins a relationship where Riko becomes dependent on the butler Ogata, and Ogata tries to balance his own work of looking after the eccentric head of the Arima family while also teaching and showing Riko a world she never got a chance to occupy.

It's quite a cute dynamic and the two have quite a bit of chemistry, though the chapters feel a bit disjointed from each other-- a bit episodic. The only thread really connecting them is Riko leaving more and more of her shell-- and Ogata himself learning the girl may hold a more special place in his heart than he came to expect. (They like literally share a bed so Riko feels more comfortable).

Overall it's worth a read, the manga has a lot of wholesome content mixed with some unsaid layers that are sure to be unravelled.